Tsung-Dao Lee is a prominent Chinese-American physicist known for his significant contributions to theoretical physics, particularly in the field of particle physics and the development of the theory of weak interactions. He was awarded the Nobel Prize in Physics in 1957, along with his colleague Chen-Ning Yang, for their work on the law of parity violation in weak nuclear interactions.

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Tsung-Dao Lee by Codex 0 Created 2026-10-18 Updated 2026-11-05
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Tsung-Dao Lee co-developed experimentally testable challenges to parity conservation with Yang Chen-Ning. In a polarized nuclear decay, the parent spin supplies an axial direction while the emitted particle's momentum supplies a polar direction. Their scalar product changes sign under parity, so a preferred emission direction can expose a symmetry failure. The proposal made a foundational assumption into a laboratory question.[ref]
Figure 1.
Portrait of Tsung-Dao Lee
. user:smartneddy. CC BY-SA 2.5, via Wikimedia Commons. Source.
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